Which of the following statements about airborne pathogens is correct?

• A. All airborne pathogens are limited to transmission within a few centimeters of the source.
• B. Airborne pathogens cannot survive outside the host for more than a few seconds.
• C. Airborne transmission is only possible in laboratory settings and not in natural environments.
• D. Some airborne pathogens can travel significant distances through the air, especially in aerosolized form.

Answer: (D)

Verified step by step guidance

1. Understand the definition of airborne pathogens: these are microorganisms that can be transmitted through the air, often via droplets or aerosols expelled when an infected person coughs, sneezes, or talks.
2. Recognize that airborne transmission involves particles that can remain suspended in the air for varying periods, allowing them to travel distances beyond just a few centimeters from the source.
3. Consider the survival capabilities of airborne pathogens outside the host; many can survive for minutes to hours depending on environmental conditions such as humidity, temperature, and UV exposure.
4. Evaluate the settings where airborne transmission can occur: it is not limited to laboratory environments but can happen naturally in everyday settings like crowded indoor spaces.
5. Conclude that the correct statement acknowledges that some airborne pathogens can travel significant distances through the air, especially when aerosolized, which is why infection control measures often focus on ventilation and air filtration.